<template>
  <div class="permission-container">
    <div class="app-container">
      <!-- 表格 -->
      <el-card>
        <div style="text-align: right; margin-bottom: 20px">
          <el-button type="primary" size="small" @click="addBtn(1,'0')">添加权限</el-button>
        </div>
        <el-table
          border
          :data="list"
          row-key="id"
        >
          <el-table-column label="名称" prop="name" />
          <el-table-column label="标识" prop="code" />
          <el-table-column label="描述" prop="description" />
          <el-table-column label="操作">
            <template #default="{ row }">
              <el-button v-if="row.type==1" type="text" @click="addBtn(2,row.id)">添加</el-button>
              <el-button type="text" @click="hEdit(row.id)">编辑</el-button>
              <el-button type="text" @click="hDel(row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
    </div>
    <!-- 添加弹出的对话框 -->
    <el-dialog :visible.sync="showDialog" title="弹层标题" @close="resetForm">
      <!-- 表单内容 -->
      <el-form
        ref="form"
        label-width="100px"
        :model="formData"
        :rules="rules"
      >
        <el-form-item label="权限名称" prop="name">
          <el-input v-model="formData.name" />
        </el-form-item>
        <el-form-item label="权限标识" prop="code">
          <el-input v-model="formData.code" />
        </el-form-item>
        <el-form-item label="权限描述">
          <el-input v-model="formData.description" />
        </el-form-item>
        <el-form-item label="权限启用">
          <el-switch
            v-model="formData.enVisible"
            active-text="启用"
            active-value="1"
            inactive-text="不启用"
            inactive-value="0"
          />
        </el-form-item>
      </el-form>

      <template #footer>
        <div style="text-align: right;">
          <el-button @click="showDialog = false">取消</el-button>
          <el-button type="primary" @click="submit">确定</el-button>
        </div>
      </template>
    </el-dialog>
  </div>
</template>

<script>
import { getPermissionList, addPermission, delPermission, updatePermission, getPermissionDetail } from '@/api/permission.js'
import { tranListToTreeData } from '@/utils'

export default {
  name: 'Permission',
  data() {
    const validCode = (rule, value, callback) => {
      // 添加时的校验：code不能重复
      let existCodeList = this.originList
      // 是编辑状态可以取自己
      if (this.isEdit) {
        // 编辑时的校验: code能取自己
        existCodeList = this.originList.filter(item => item.id !== this.formData.id)
      }
      existCodeList.map(it => it.code).includes(value) ? callback(new Error(value + '已经占用')) : callback()
    }
    const validName = (rule, value, callback) => {
      // 添加时的校验： 名字不能取子元素的名字
      let existNameList = this.originList.filter(item => item.pid === this.formData.pid)
      if (this.isEdit) {
        // 编辑时的校验： 名字不能取兄弟（排除自己）的名字
        // 找兄弟，排除自己
        existNameList = this.originList.filter(item => item.pid === this.formData.pid && item.id !== this.formData.id)
      }
      existNameList.map(it => it.name).includes(value) ? callback(new Error(value + '已经占用')) : callback()
    }
    return {
      list: [],
      showDialog: false, // 是否显示弹层
      formData: {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      },
      rules: {
        code: [{ message: '不能为空', required: true, trigger: 'blur' }, { validator: validCode, trigger: 'blur' }],
        name: [{ message: '不能为空', required: true, trigger: 'blur' }, { validator: validName, trigger: 'blur' }]
      },
      originList: [], // 用于收集为转为tree的数据
      isEdit: false// 判断编辑
    }
  },
  created() {
    this.loadPermissionList()
  },
  methods: {
    // 数据回显函数
    async loadPermissionList() {
      const { data } = await getPermissionList()
      console.log('从后端获取的数据的是', data)
      this.originList = data.data
      // 转tree数据
      this.list = tranListToTreeData(data.data, '0')
      console.log(this.list)
    },
    // 添加按钮
    addBtn(type, id) {
      this.isEdit = false
      this.showDialog = true
      this.formData.type = type
      this.formData.pid = id
    },
    async doAdd() {
      await addPermission(this.formData)
      this.showDialog = false

      this.$message.success('添加成功')
      this.loadPermissionList()
    },

    submit() {
      this.isEdit ? this.doEdit() : this.doAdd()
    },
    resetForm() {
      this.formData = {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      }
    },
    async doDel(id) {
      try {
        await delPermission(id)

        this.loadPermissionList()
        this.$message.success('删除成功')
      } catch (err) {
        console.log(err)
        this.$message.error('删除失败')
      }
    },
    // 用户点击删除
    hDel(id) {
    // alert(id)
      this.$confirm('你确定要删除吗？').then(() => {
        this.doDel(id)
      }).catch(() => {

      })
    },
    // 用户点击了编辑 数据回显
    async hEdit(id) {
      this.isEdit = true
      // alert(id)
      // 1. 根据id去获取详情
      const { data } = await getPermissionDetail(id)
      console.log('从后端返回的权限点详情数据是', data)
      // 2. 填充在表单中
      this.formData = data.data
      // 3. 显示弹层
      this.showDialog = true
    },
    async doEdit() {
      try {
        const res = await updatePermission(this.formData)
        console.log(res)

        this.showDialog = false
        this.loadPermissionList()
        this.$message.success('修改成功')
      } catch (err) {
        console.log(err)
        this.$message.error('修改失败')
      }
    }

  }
}
</script>

<style>

</style>
